sigma
word
Definition
Sigma is the Greek letter Σ or σ. In English, it's often used in mathematics and science to represent summation or the standard deviation in statistics.
Usage & Nuances
Common in technical, academic, and scientific language. Uncapitalized 'sigma' often refers to statistics ('standard deviation'), while upper-case 'Sigma' is for summation (Σ). In internet slang, 'sigma male' has a recent, unrelated meaning. Context determines whether it points to the letter, a concept in math/statistics, a process name like 'Six Sigma', or internet slang.
Example Sentences
The symbol sigma means 'sum' in mathematics.
basic
Lowercase sigma stands for standard deviation in statistics.
basic
Greek uses sigma as one of its letters.
basic
We learned how to use uppercase sigma for adding a series of numbers.
natural
The concept of Six Sigma is popular in business for quality control.
natural
There’s been a lot of talk about the 'sigma male' trend on social media.
natural